
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head lang="en">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title>1212</title>
    <style type="text/css">
        /*解决html转pdf文件中文不显示的问题*/
        body {
            font-family: "Microsoft YaHei";
            font-size: 7pt;
            line-height: 17pt;
        }
 
        .imgdev {
            width: 100%;
            display: inline-block;
        }
 
        .headerdev {
            width: 100%;
        }
    </style>
</head>
 
<body>
<div class="imgdev">
    <img src="${logo1}" width="310" height="72"/>
    <div style="color: #555">
        <div>${info1}</div>
        <div>${info2}</div>
        <hr style="background-color: #888;height: 1px"/>
        <div style="fontWeight: 600">${com}</div>
        <div style="fontWeight: 700">${comen}</div>
    </div>
</div>
<div class="headerdev">
        ${context}
    <br/>
    <img src="${auto}" width="90" height="42" style="padding-left: 50px"/>
    <img src="${auto2}" width="100" height="80"/>
    <div class="line"></div>
    <p>${title}</p>
</div>
</body>
</html>

2.修改文件后缀，把html改成ftl

二、生成PDF并加密

1.引入jar包


<!-- spring boot 项目请添加此依赖 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>
<!-- 非spring boot 项目请添加此依赖 -->
<dependency>
    <groupId>org.freemarker</groupId>
    <artifactId>freemarker</artifactId>
    <version>2.3.30</version>
</dependency>
<!-- 对生成的PDF加密的jar -->
<dependency>
    <groupId>e-iceblue</groupId>
    <artifactId>spire.office.free</artifactId>
    <version>2.2.0</version>
</dependency>

2.关键代码

代码如下：


public class PDFTest {
 
    private static String path ="Y:\\1";
 
    /**
     * 生成PDF并加密
     */
    @org.junit.jupiter.api.Test
    public byte[] test()
    {
 
        Configuration configuration = new Configuration();
        configuration.setDefaultEncoding("UTF-8");
        //构建PDF需要替换的值
        Map psnMap = (Map) this.getFormInfo(pk, visa);
        Map map = this.dataDownPdfQuery(psnMap);
        String templateName="1.ftl";
        configuration.setDirectoryForTemplateLoading(new File(path));
        Template templatehtml = configuration.getTemplate(templateName);
        File file = new File(templateName);
        StringWriter writer = new StringWriter();
        templatehtml.process(map, writer);
        writer.flush();
        OutputStream os = null;
        File files=new File(path + File.separator + templateName.replace(".ftl", ".pdf") );
        os = new FileOutputStream(files);
        ITextRenderer renderer = new ITextRenderer();
        renderer.setDocumentFromString(writer.toString());
        ITextFontResolver fontResolver = renderer.getFontResolver();
        fontResolver.addFont(path + File.separator+"fonts/mcyahei.ttf", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
        renderer.layout();
        renderer.createPDF(os);
        os.close();
 
        //上半段是生成PDF，下半截是对生成的PDF进行设置密码加密
        //创建PdfDocument实例
        PdfDocument doc = new PdfDocument();
        //加载PDF文件
        doc.loadFromFile(files.getAbsolutePath());
        doc.getPages().add();
        //对文件进行加密
        PdfEncryptionKeySize keySize = PdfEncryptionKeySize.Key_128_Bit;
        String date="20221222"
        String openPassword = date;//打开文档时，仅用于查看文档
        String permissionPassword = date;//打开文档时，可编辑文档
        EnumSet flags = EnumSet.of(PdfPermissionsFlags.Print, PdfPermissionsFlags.Fill_Fields);
        doc.getSecurity().encrypt(openPassword, permissionPassword, flags, keySize);
        doc.getPages().remove(doc.getPages().get(doc.getPages().getCount()-1));
        //保存文件
        doc.saveToFile(files.getAbsolutePath());
        doc.close();
        return EntryFileConfiguration.fileToBytes(files);
    }
}

注意注意！

如果内容中出现了特殊符号记得用转义符替换，&换&


// 获取相应的需要替换的内容
    Iterator<Entry<String, Object>> map1it = map.entrySet().iterator();
		while (map1it.hasNext()) {
        Map.Entry<String, Object> entry = (Entry<String, Object>) map1it
                .next();
        if (!(entry.getValue() instanceof List)) {
            if (entry.getValue() != null
                    && entry.getValue().toString().contains("&")) {
                String newValue = entry.getValue().toString().replace("&", "&amp;");
                map.put(entry.getKey(), newValue);
            }
            if (entry.getValue() != null&& entry.getValue().toString().contains("<")) {
                String newValue = entry.getValue().toString().replace("<", "&lt;");
                map.put(entry.getKey(), newValue);
            }
        } else {
            for (Object childMap : (List) entry.getValue()) {
                if (childMap != null && (childMap instanceof Map)) {
                    Map<String, Object> child = (Map<String, Object>) childMap;
                    for (Entry<String, Object> childEntry : child.entrySet()) {
                        if (childEntry.getValue() == null) {
                            continue;
                        }
                        if (childEntry.getValue().toString().contains("&")) {
                            String newValue = childEntry.getValue().toString().replace("&", "&amp;");
                            child.put(childEntry.getKey(), newValue);
                        }
                        if (childEntry.getValue().toString().contains("<")) {
                            String newValue = childEntry.getValue().toString().replace("<", "&lt;");
                            child.put(childEntry.getKey(), newValue);
                        }
                    }
 
                }
            }
        }

总结

本文仅仅简单介绍了通过ftl模板生成PDF的使用，而使用spire.office.free jar提供了大量能使我们快速便捷地处理PDF加密解密的方法，继续探究冲冲冲！

声明：本文内容由网友自发贡献，转载请注明出处：【wpsshop博客】